What is the difference between a primer and a topcoat in modern water paint? Why do you have to appl

It is said that decoration is a very esoteric science, and the decoration inside the routine is very deep, if you know too little about decoration is likely to encounter "decoration traps", there are many similar names in the decoration of products, such as topcoat and primer. If you don't know much about topcoat and primer, you will definitely be curious about what is the difference between topcoat and primer, and think that you should understand what the role of primer is first? What is the role of a topcoat?

Then by comparing the role of primer and topcoat, you can know the difference between them. The role of primer Primer is the first layer of the paint system, which is used to improve the adhesion of the topcoat, increase the fullness of the topcoat, provide alkali resistance, provide anti-corrosion function, etc., and at the same time ensure the uniform absorption of the topcoat, so that the paint system can play the best effect. No matter how good the topcoat is, you need to brush the primer first to improve adhesion, corrosion resistance, alkali resistance, etc.

Applying a layer of sealing primer before applying the topcoat can not only save the decoration cost, but also have the advantage of getting twice the result with half the effort in the long run and the decorative effect. At the same time, the good adhesion of the primer makes the wall surface smoother, making the topcoat easier to apply and reducing the amount of topcoat used. In this way, the wall not only avoids paint sickness, but also helps to maintain the painting effect for a longer time.

The role of topcoat Topcoat is the final coating of painting, and it is the last layer to be applied in the decoration of the building wall, and the overall effect presented after decoration is reflected through this layer. The topcoat has high requirements for the material, such as good chromaticity and brightness, etc., should have a good resistance to external conditions, and must have the necessary hue and decoration, and have a protective effect on the bottom coat. For outdoor use, the topcoat should be made with excellent weather resistance.

The decorative effect and weather resistance of a topcoat depend not only on the base of the paint used, but also on the pigments used and the preparation process. The difference between topcoat and primer 1. Different compositions: The primer is composed of four parts: resin, filler, solvent and additives; The difference between the topcoat component and the primer is mainly that the former has little or no filler.

2. The role is different: the primer is the first layer of the paint system, which is used to fill the paint surface, support the topcoat, provide fullness, reduce costs, and help save energy; The topcoat is the final coating of the coating, which is the last layer to be applied in the decoration of the building wall, so as to increase the number of coating layers of the topcoat and the method of thickly applying the topcoat to increase the thickness of the paint film. The thickness of the coating is mainly provided by the primer, while the topcoat is mainly used for decoration and protection.

If you take the topcoat and primer literally, the topcoat must be the paint applied to the top layer, and the primer is the paint applied to the bottom. The role of primer and topcoat in decoration is different, probably because the composition of primer and topcoat is different, resulting in different decoration effects of primer and topcoat. Through the introduction of primer and topcoat, you will find that there is such a big difference between primer and topcoat, and you must choose carefully when choosing primer and topcoat next time.

The primer of modern water paint will be rougher than the topcoat, but it has a good binding force with the wall, can fix some floating ash on the surface, close the alkalinity of the wall, and is waterproof and breathable. The topcoat is relatively delicate and has a good texture, but the direct binding force with the wall is not strong, and the alkali resistance is weak.

The difference between a primer and a topcoat is that the composition of the primer is a resin, solvent, additives and fillers, while the topcoat is composed of resins, solvents, additives and little or no fillers; They have a different role between them, in the construction, the primer is the first layer to be brushed up, the most important role is to make the paint smooth and flat, so as to support the topcoat, reduce the cost of decoration, but also save energy, and the topcoat is the last "gatekeeper" in the whole construction, it can reflect the gloss, feel, scratch resistance and other characteristics of the entire wall paint, so the quality of the topcoat directly determines the quality of the whole paint film.

The difference between primer and topcoat: the difference between primer and topcoat: first, the composition between the two is different, the primer contains resin, additives, solvents and fillers, while topcoat is composed of resin, solvent, additives and little or no filler; Second, there is a different role between the two, in the paint system, the primer is the first layer to be brushed up, its main role is to make the paint surface smooth, so as to support the topcoat, make the paint surface look more plump, reduce the cost of decoration, and save energy, and the topcoat is the last "gatekeeper" in the entire paint system, it can reflect the gloss, feel, scratch resistance and other characteristics of the entire paint surface, so the quality of the topcoat directly determines the quality of the whole paint film.

As the basis of the topcoat, the role of the primer is as follows:

1. Close the grassroots level.

The wall should be painted, and the primer should be brushed first, which can effectively seal the base layer and form a complete package and isolation of the base layer.

2. Enhance adhesion.

The primer has stronger adhesion and adhesion. Brush the primer before brushing the latex paint, which can improve the adhesion between the latex paint film and the wall, and effectively avoid the peeling and falling off of the wall.

3. Fill in the grassroots level.

The primer can repair some construction defects in the base layer (putty layer), such as unevenness or small potholes, and improve the flatness of the entire plane.

Fourth, enhance the decoration of the topcoat.

Brush the primer first to ensure that the topcoat can be evenly absorbed, increase the decorative effect of the topcoat, make the decorative effect of the topcoat more plump, and make the paint system play the best effect. Especially when doing color paint, be sure to brush the primer, the uniformity of the color, the color development is better.

5. Alkaline resistance.

Nowadays, the pace of life is fast, and many families often can't wait for the putty to dry completely and the alkalinity disappears (5-7 days) before painting. At this time, it is more necessary to brush a layer of anti-alkali primer to seal the alkalinity of water-resistant putty (this is another defect of water-resistant putty), otherwise the paint is prone to problems, especially the color of the paint, and there will be a map-like uneven color phenomenon.

Reasons to apply primer when painting:

1. Closure: Some walls are more alkaline, and alkaline flowers are produced after being soaked in moisture and water, the scientific name is "pan alkali", which causes the formation of crater-like protrusions on the surface of the paint film, and forms a layer of alkali frost on the surface of the paint film in serious cases, which eventually destroys the paint film. Latex paint primers can act as a sealant to alleviate this situation.

2. Adhesion: The emulsion content in the primer is high and the adhesion is strong. It can improve the adhesion between the latex paint film and the wall.

Difference Between Primer and Topcoat:

1. The composition of primer and topcoat is different.

The primer is generally composed of four parts: resin, filler, solvent and additives, while the topcoat is generally composed of three parts: resin, solvent and additives, and does not contain fillers or contains very little amount.

2. Play a different role

The primer is the first layer of the paint system, which is used to fill the paint surface, support the topcoat, provide fullness, reduce costs, and help save energy; The topcoat is the final coating of the coating, and the thickness of the coating is mainly provided by the primer, while the topcoat mainly plays a decorative and protective role.

The topcoat is mixed with coarse and fine aggregates, or the methods of brushing, spraying and knurling are used for construction, and various textures, patterns and textures can be obtained, which is a special artistic effect for the building, so as to achieve the purpose of beautifying the environment and decorating the building.

Difference 1: The composition is different, the primer is mainly composed of resin, additives and solvents, while the topcoat is composed of resin, solvent, additives and a small amount of fillers; Difference 2: The primer is mainly used to close the base layer, fill the wall, support the paint surface and improve the fullness of the wall, while the topcoat is mainly used for decoration and protection; Difference three:

**No, the primer is lower than the topcoat.

The difference between a primer and a topcoat.

Difference 1: The composition is different.

The transparent paint and solid color primer of the primer are composed of film-forming substances, fillers, solvents and additives; Topcoats, on the other hand, are composed of resins, solvents, additives, and little or no fillers.

Difference 2: The role is different.

The primer is the first layer of wall construction, while the topcoat is the second layer of paint application. The primer mainly plays the role of sealing the base layer, filling the wall, supporting the paint surface and improving the fullness of the wall.

Whereas, the topcoat mainly plays a decorative and protective role. At the same time, the topcoat also has the characteristics of scratch resistance, aging resistance, yellowing resistance and so on.

Difference 3: **Different.

Primers and topcoats are not the same in composition and function, so they are also not the same in terms of **. From the point of view, the primer is lower than the topcoat.

Although the primer and topcoat are between 100-300 yuan, because the topcoat will directly affect the quality of the entire paint film, the quality of the topcoat and the topcoat will be higher.

A variety of materials are used in decoration, especially when decorating the walls, a variety of paints can be used. Different types of paints play different functions, and some people don't know what it is used for after seeing these paints, such as primers, and why they use it in wall decoration. The primer is similar to the topcoat we are familiar with, and many people may be interested in the difference between the two, so what is the difference between the primer and the topcoat?

Difference Between Primer and Topcoat:

1. The composition is different.

In terms of composition, the primer is generally composed of four parts: resin, filler, solvent and additives.

2. Play a different role

The primer is the first layer of wall painting, which is used to fill the paint surface, support the paint surface and improve the fullness, and the use of primer is conducive to saving materials and reducing costs; The topcoat is the last layer of the paint system and plays a decorative and protective role.

The role of the topcoat: the topcoat mainly has the characteristics of scratch resistance, gloss, feel, transparency, aging resistance, yellowing resistance, etc., and the quality of the topcoat directly affects the quality of the entire paint film.

The role of primer: the use of primer can effectively close the base layer, make the wall base more firm, and also enhance the adhesion of the top coat, in addition, the use of primer can make up for the fine cracks of the wall, which can effectively improve the flatness of the wall.

What are the specific functions of the primer:

1. Adhesion.

The primer can enhance the adhesion of the topcoat, improve the adhesion between the latex paint film and the wall, and effectively avoid the occurrence of peeling and peeling off of the wall.

2. Fill in. Primer can make up for microcracks and improve the flatness of the wall, if the wall is relatively flat, you can not use primer, but the use effect will be better, it is generally recommended to use.

3. Closed. The sealing of the primer is better, it can effectively close the base layer, make the base more firm, some walls are more alkaline, and after being soaked in moisture or water, alkali flowers will be born, such alkali flowers will form a layer of alkali cream on the surface of the paint film, thereby destroying the paint film, and the primer can play a role in alleviating and preventing the occurrence of such a situation.

4. Cost saving.

Primer and topcoat are also different in terms of **, generally speaking, primer will be relatively cheaper, so the correct use of primer can save a certain amount of decoration expenses.

What is the difference between a primer and a topcoat? Primer and topcoat have their own construction technology, when using the base coat or topcoat decoration, professional decoration workers can combine the actual situation for you to deal with, so that the primer and topcoat will not have any problems when decorating the wall, and the results of the decoration are also very good. In addition to primers and topcoats, there are other paints for wall decoration, if you need to know about them, or want to know how to use them, you can find more content updates on this website.

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